<div dir="ltr"><div dir="ltr"><div>Hi,</div><div><br></div><div>The merge algorithm <a href="https://docs.qgis.org/3.4/en/docs/user_manual/processing_algs/qgis/vectorgeneral.html#merge-vector-layers">https://docs.qgis.org/3.4/en/docs/user_manual/processing_algs/qgis/vectorgeneral.html#merge-vector-layers</a> ?</div><div><br></div><div>Harrissou<br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le ven. 5 avr. 2019 à 07:45, Stefan Giese (WhereGroup) <<a href="mailto:stefan.giese@wheregroup.com">stefan.giese@wheregroup.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">You can use virtual layers (one possibility) with a union statement, <br>
something like:<br>
<br>
SELECT geometry, field1, field2 FROM layer1<br>
UNION SELECT geometry, field1, field2 FROM layer2<br>
UNION SELECT geometry, field1, field2 FROM layer3<br>
...<br>
<br>
---<br>
Mit freundlichen Grüßen<br>
Stefan Giese<br>
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Am 2019-04-05 05:45, schrieb Boaz Bar Ilan:<br>
> hi<br>
> <br>
> is there a way to union many polygons which belongs to different<br>
> layers all at once?<br>
> <br>
> thanks<br>
> <br>
> boaz<br>
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